<template>
  <div class="pagination-container">
    <el-pagination
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    />
  </div>
</template>

<script>
import { scrollTo } from '@/utils/scroll-to'

export default {
  name: 'Pagination',
  props: {
    total: {
      required: true,
      type: Number
    },
    page: {
      type: Number,
      default: 1
    },
    limit: {
      type: Number,
      default: 20
    },
    pageSizes: {
      type: Array,
      default() {
        return [10, 20, 30, 50]
      }
    },
    layout: {
      type: String,
      default: 'total, sizes, prev, pager, next, jumper'
    },
    background: {
      type: Boolean,
      default: true
    },
    autoScroll: {
      type: Boolean,
      default: true
    },
    hidden: {
      type: Boolean,
      default: false
    }
  },
  computed: {
    currentPage: {
      get() {
        return this.page
      },
      set(val) {
        this.$emit('update:page', val)
      }
    },
    pageSize: {
      get() {
        return this.limit
      },
      set(val) {
        this.$emit('update:limit', val)
      }
    }
  },
  methods: {
    handleSizeChange(val) {
      this.$emit('pagination', { page: this.currentPage, limit: val })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    },
    handleCurrentChange(val) {
      this.$emit('pagination', { page: val, limit: this.pageSize })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    }
  }
}
</script>

<style lang="scss">

.pagination-container {
  padding: 15px;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  margin-top: 15px;
  text-align: right;

  .el-pagination {
    margin: 0;
    padding: 0;
    font-weight: normal;
    
    .el-pagination__total {
      margin-right: 16px;
    }
    
    .el-pagination__sizes {
      margin-right: 16px;
    }
    
    .el-pagination__jump {
      margin-left: 16px;
    }
    
    .btn-prev,
    .btn-next {
      background: #f4f4f5;
      border: none;
      border-radius: 4px;
      padding: 0 12px;
      height: 28px;
      line-height: 28px;
      margin: 0 4px;
      
      &:hover {
        background: #e9e9eb;
      }
      
      &:disabled {
        background: #f4f4f5;
        color: #c0c4cc;
        cursor: not-allowed;
      }
    }
    
    .el-pager {
      li {
        background: #f4f4f5;
        border: none;
        border-radius: 4px;
        padding: 0 12px;
        height: 28px;
        line-height: 28px;
        margin: 0 4px;
        
        &:hover {
          background: #e9e9eb;
        }
        
        &.active {
          background: #409EFF;
          color: #fff;
        }
      }
    }
  }
}
</style>
